Cliff Charlesworth Olympia build in Bishop, CA.

Let us all watch your new project progress.
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Peter Balcombe
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Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: Cliff Charlesworth Olympia build in Bishop, CA.

Post by Peter Balcombe » 20 Jan 2018, 11:12

Greg,
Have checked my wings this morning & the brake servos are fitted just aft of the main spar between ribs R2A & R3.
My brakes assemblies are right & left handed, with full depth blades top front & bottom rear on each wing.
Servo covers are same thickness as skin, resting on bearers installed before wing was skinned & sanded flush with tops of ribs - thus top of cover will be flush with top of skin.
Photos below show detail of servo installation (9g MG micros servos in each case).
Photo labels will hopefully make each one clear.
Note that Cliff Evan's Oly originally used micro brake servos as mine, but he had a lot of trouble with burnt out servos. Changed to larger servos & had no further trouble.
Attachments
Aileron servo cover.JPG
Aileron servo cover
Aileron servo.JPG
Aileron servo
Aileron servo cleared.JPG
Aileron servo cleared
Brake servo cover.JPG
Brake servo cover
Brake servo_closed.JPG
Brake servo_brake closed
Brake servo_open.JPG
Brake servo_brake open
RH wing underside_root left.JPG
RH wing underside_root left
RH wing inverted_root left.JPG
RH wing from front_root left
LH wing rear_root right.JPG
LH wing from rear_root right

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RobbieB
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Joined: 07 Mar 2015, 22:22
Location: North West

Re: Cliff Charlesworth Olympia build in Bishop, CA.

Post by RobbieB » 20 Jan 2018, 12:11

Peter,

That clevis in photo #5 looks a bit scary!

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Peter Balcombe
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Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: Cliff Charlesworth Olympia build in Bishop, CA.

Post by Peter Balcombe » 20 Jan 2018, 12:41

Yes, its closed up now though ;)

Greg Smith
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Joined: 26 Jan 2016, 00:20

Re: Cliff Charlesworth Olympia build in Bishop, CA.

Post by Greg Smith » 27 Jan 2018, 19:00

Thank you for the latest advice, Peter: some important things dealt with there!I think I will be motivated to triple-check everything in an unprecedented way with this model. A friend has suggested that, with so much time and care invested in such creations, it is remarkable that they are ever flown at all. Perhaps like pregnancy, though, it's funny how once the model is in the air, the memory of the gestation period becomes less powerful.
I will look again at the servo issue. Given that the humidity here is generally around ten percent, it's not such a likely issue as in Britain, but I will remove the servo and test it outside the craft. I was relieved to hear about the wiring issue, as the runs will be long in the Oly wing.
I'm currently working on aileron hinging, using Robart hinges buried at three rib positions. Awkward enough to reconsider on the second wing.I won't worry if they don't match! The problem with putting them within the rib is that the little setscrews won't be accessible, so I have to make sure that the pin part is well anchored in the pockets: but this is doable. The crux is always getting things perfectly centred so that the aileron is free-moving.

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Peter Balcombe
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Location: Clevedon, North Somerset, U.K.

Re: Cliff Charlesworth Olympia build in Bishop, CA.

Post by Peter Balcombe » 27 Jan 2018, 20:18

Greg,
It is probably also worth mentioning that whilst long servo leads aren’t a problem with 2.4GHz radios, I hope that you are going to use decent sized servo wire rather than thin stuff.
You need to minimise voltage drop along the longer cable lengths, particularly if running from 4.8v packs.
I use the standard (22 gauge?) wire without a problem, even with a 4.8v pack.
20 gauge would be better if available.

Greg Smith
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Joined: 26 Jan 2016, 00:20

Re: Cliff Charlesworth Olympia build in Bishop, CA.

Post by Greg Smith » 27 Jan 2018, 20:36

Good point. I’ll also be using 6volt power supply.

Greg Smith
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Joined: 26 Jan 2016, 00:20

Re: Cliff Charlesworth Olympia build in Bishop, CA.

Post by Greg Smith » 03 Apr 2018, 16:13

I have posted in general discussion as well: I hope the double post is OK, but I'm feeling a bit desperate here, as I don't have enough natural Solartex to cover my wings,and I've already done the tail assembly and rudder. I wonder if others were caught in the middle of a project? I'm kicking myself for not buying it earlier, but had no idea that that wonderful company was going out of business. If anyone has any, you'll probably hang on to it, but I'd really like to buy some and save this project, or get advice about an alternative. I SUPPOSE I could rip the covering I've already done, but I might not...

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Cliff Evans
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Location: Bristol
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Re: Cliff Charlesworth Olympia build in Bishop, CA.

Post by Cliff Evans » 03 Apr 2018, 16:40

See if you can get the light weight Ceconite over there. you will need to buy adhesive as well.

Greg Smith
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Joined: 26 Jan 2016, 00:20

Re: Cliff Charlesworth Olympia build in Bishop, CA.

Post by Greg Smith » 06 Apr 2018, 18:45

Thanks, Cliff: I've done a bit of research and have ordered some stits polylite covering: yes, adhesive is needed for this. There is a technique video as well, and I must say it looks trickier than Solartex, which was the easiest covering I've ever used. Maybe save a bit of weight re adhesive, though, and it seems as if it will produce a very rigid structure.You cover the wing in one piece: one complete wrap... I'll report back, but it will certainly be a learning experience.

Greg Smith
Posts: 123
Joined: 26 Jan 2016, 00:20

Re: Cliff Charlesworth Olympia build in Bishop, CA.

Post by Greg Smith » 20 Jun 2018, 05:20

Started up again after a long layoff, including a few weeks in Blighty! What amazing weather: hope you all got lots of flying in. I'm working still on the spoiler (still on wing one) and I must say that this is probably the most frustrating and time-consuming task I have ever undertaken in all my modelling life. I get it working fairly smoothly, then for some reason it doesn't work at all. Yet the basic mechanism is so simple, and I built it as accurately as possible, well aware of the need for exactitude.As per recommendation, I'm installing a hefty servo near the wing root, slotting the palstic bearers down in between two ribs, having worked out that I'll need 15mm of movement at the servo arm to achieve full opening and closing.
The highlight of my recent visit was visiting the RAF museum at Hendon and seeing David Glen's Spitfire model: oh, and flying a Radian with my great-nephew! I'll try to post a couple of pictures, but the amount of stab in the dark hacking that I'm doing might show me up in this company...

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